brackett



F. W. BRACKETT SCREENING APPARATUS Filed March 26. 1925.

6 Sheets-Sh'et 1 May 18,1926. v

1,585,461 F. w. BRACKET-r SCREENING APPARATIUS Filed March 26. 192s e sheets-sheet 2 May 18, 1926.

, F. W. BRACKETT Y SCREENING `APPARATUS I Filed Marchl 26,. 19.25 6 Sheets-Sheet 5 May 18,1926

- `F. W. BRACKETT SCREENING APPARATUS 6 SheetsjSheet 4 Filed March 26I 1925 fm WW? May l W2K SCREENING APPARATUS Filed March 26, 1925 SCREENING APPARATUS Filed Mafh 26. 1925 s sheets-sheet 6 Petenteel i8, l.

' @renners wmr'wnnnnnnoxnnonooL'oHEsTER/ENGLAND Y i ,sennnn'me APPARATUS.' npp1ieuonniesMaren ze, 1925. se'riai no; 18,539.

.My invention relees'f to apparatus 'for drun'iq(Fig. 4).' composed "of u number of l screening' or filtering Water o r other liquid.. grooved pulleys d mounted on the shaft containing solid n'nitter insuspension, or nndfrec toturn'independently.'thereof` and tor' sievingzori screening; moreorless dry yof nachhothcr, the tWo end pulleys being 00 rso'lid materiel, of the kind in i'vhi'clrtlie preferably keyedto the 'sha'ftnnd havingv screen is un endless band that trnvelsbvcr Voutside flanges (Z2. L a.' drum. y luthe upperpartof the frmnev a isjour'l One object of theinvention isto obtains. nnlled the shaft of n drum (Fig. 3) hav'- more ellicient screening 'than is 'afforded by ing; peripheral tgrooves {corresponding'- in Q5 known-apparatus; another is toco'nstruct anumber. andjpitch' with' 'thefgrooves' ofthfe screen of this kind'ivhich 'conf,be oleoned`.pulleys cl'. 'Ihisdrur'n ispref'ernbly coni-:ff easily While in operation and will offer` lessr posedot n number of pulleys efrnounted onf, resistance to the passage ofwntentlian that the shaft... and' *"t'ree to turn. independently'. olered by known screensot thekind. Anf .thereof and of Y@noli other, thetwoend'pulg-1Q other object is to construct' a screen "of this leysbe.ingleyecl tothe shtfttzind preferably type which shall. be economical in respect ot ot semen-'hut greater width than the inter#A a cost oit upkeep and consumption power.I mediate p1 illey s;'thcse pulleyshavefoutside'j Vlithv these :and other vobjects I lieve contlungros e2. It will be noted tha t each pulley structed a. screenr comprising eco'ntinuous zu'ri'es more than one `groove. In the form 'rope or its equivalent travelling o verdrums villustrated the number of grooves is three ,35 'larneu scale;

'in such a. .manner that 'it ornisi'pzirallel yfor each of the intermediate" pulleys sind. fvej lengths close enough 'to eachother' tol prefor the end pulleys. This use ot afnuinbei vent passage between thenifof the' materiel' ot orooreson each' pulley contributes to the.,

to be tutored.vr i smooth rijin'niilg' ofv the screen.' The,sbatte:.8107A 'lhisconstruction and the .features of. iny isch-iron through geel" by'zrshiftg, itself4 inventionfiil'l be 'understood clearly-from"driven through pulley g". by suitable the following description with referenceqto motor g2. f f the accompanying drawings in",\vliicli- The screening surface is made by Winding `Figs. `1 and 1L readl together show rt' seccontinuous length of Wire rope or thelike tion through a sump containingl a screen inthe grooves-'of pulleys alV and 'eu Inthe constructedaccording to iny invention .case illustrated two such ropes k and it are Fig. 2 is a front" elevation off? the screen. -used on account o'l the .considernblewidth Y Fig.A 3 an' xi'ul section .through the .ofthe s .ree n'.` Therope is selectedot someupper drum of the screen, drawn to an en- 'what greater length than is neededynn'd 99;-

l I f uftorit'has been wound, itsconnected ends Fig. fl is a like section .through the lower' lirc 'formed into n, bightin which is susi drum. 'y pemled n"\veiglited'p1illey, "This keeps the Fig. 5 is a sectional detail View, alsofrope tout andthe constructionlfor the-purdruwu to an enlarged scale.. l l, pose 'here' illustrated comprises ev vertical 40 Fig. G is e side elevetion of o inodilied freine fei'ected on. :Era-me a and-suitably forni of the screen. f stayed' 'by bars '11,. This frame-a carries Fig. 7 is i section on line 6--f6 .of Fig. 6. pulleys i, i', 2, i?. As already 'steted,there Fig'. 8 isn. section on line Zw-7 of ig. 7,` .e re two ropes' h, L, sothat the p ulleysaz', z", f Fig. 9 is 'el detail View in elevation drown 2 yund 3 are duplicated as 'shown in'Figl'Q. 1.0.0 15 to anenlzu'pjed seele. fv 'f The rope haiiingbeen Wound, theendwhioh" The frane o'isnonnted byv trunuionsb in vhas lett the groove of a pulley d passes loebeurings c and rests on the bottoni o the neath an angle iron Il:4 (Whose purpose will sump in an inclined position, its angle ot v presently be explained) `which isjbolted Ito inclination lieiiigl smaller than the :ingle vof 'transverse'member aof frame o and then 105 1 i9 repose* of the materiel 'which is to be carried passes around pulleys 3 and li2 to meet the out o'l nu by 'the travel of the vscreen other end'which has lettthe groove next to .zu the the arrow, Fig. l. The one of the :lauqeseg and has passed around non* o' er in. the sump indicated pulleys e' andi. Il`he two ends reunited by the .i 11:; n ,w u' ln toe pero oft :ne Irei milled, s snuit ol c .iri'les to form .a biglitin which is suspended theno' 'ne is your# Weighted 'pulley Z. y

At itsl upper endthetreme o carries ona hinge which isa brush n fixed to a shaft n suitafter removal of the weighted pulleys, can

ably journalled in frame a. The shaft 'n be attached: When the p is drivemin the direction-indicated by an the ropes h and la. are wound up on it 'and arrow in Fig. 1, fromthe pulley' y', on shaft' the tension on the ropes pulls the"v lower y, andthe brush n brushes from pulleys e drum and the frame that carries it along the matter gcarried by the lengths of rope the guides formed by i as they pass roundv the pulleys. This rcdrum is brought above the surface of the moval -of matter is "aided by the fact that water. The rear girder s -of the frame the grooves "of the pulleys e are deeper than which carries the lower drum shaft cl is at'- the' diameter 4ofthe rope, so that matter 'adtached byl ropes w. to a shaft/w journalled boring to two or more lengths of thelatter on-the underside of frame aand adapted To totbe rotated by crankthrough gear y, the"A l 'is loosened as it vpasses over the drum.-

complete thecleansing operation the hood l ropes being guided by pulleys z carried by m contains a second brushn which is also frame a. When crank t2 has been released, carried on a shaft journalled in frame a., theframe which carries the shaft d Acan be This shaft is driven from shaft n by a belt returned to normal position by winding the as' indicated, in the direction of the arrow roes 'wf on shaft lw. l (Fig. 1). It will be seen that this second aving thus fully 'described the nature fof 20 brush brushes the pulleys before the rope. my saidl invention and the bestl means I r comes a ain in contact with the-mint e know of' carrying the same into practical course o a-rvolution. The two lengths of effect, I claim i 1 rb pe I.,v I/which' ddle of y 1.A Screening apparatus of the kind deare seen 1n the mi 2,'V pass, as already explained, Jover scribed comprising a frame, an upper shaft uleys 113,712 before they can be brushed by and alower rush n; hence it is advantageous to keep peripherally them free from deposited matter and 1t is on the upper shaft mounted 'in the frame, grooved pulleys mounted free shaft, at least one peripherally girders g, so that the' di' a hood-shaped hopper within v to which the bights of the ropes v)tand-11,',

shaft t is rot-ated,-

for this purposethat they travel beneath the grooved pulley keyed lto 4the upper shaft, l

Vanrfzle iron c asfalready explained.v ',periphera'lly grooved pulleys mounted free o' ensoire correct engagement. of4 the on the lower shaft and a continuous rope lengths of'A the 'r ')pe,v v1th the groo' o fwound in the grooves of the pulleys of bothui eys Ial', there is mounted to rote earings carried by frame a, a roiler o \iz"rg. y parallel lengths of rope. 1) grooved correspondingly with the sev- 2. Screening apparatus of'the kind' deeral pulleys d and'situated 'eloselto the lat-v 'scribed comprising a frame, an `upper shaft ter so as to engage the'several lengths of and a lower shaft mounted in the fra1ne,a "rope just' `before they enter the pulley n-umber one peripheral groove mounted free to turn on the upper shaft'at least one peripherally grooved pulley keyed to the-,upper shaft,

The eyes p, pi on the frame a'permit of 'the screen-being removed entirely fromthe Sllrplp.k by means' of attached tackle for the lSG1-een may be turned 011 its IUTIHIODS ,by lower shaft and a continuous rope wound in attaching the tackle `to `eyes p only, so that 'tli'e the lower lpart of the screen can beraised ag' from the sum fon-inspection or rpiiri -parallel lengths of rope.` l v In-the me, v1 ficat1on shown fin Figs. 5'-9, 3.v Screening apparatus "of the kindy dethe shafts dfand roller 0 are c'arrled 1n 'a scribed comprising a frame, an upper shaft frame Separate from the frame a end whichy and a lower shaft mounted i i 'is adapted to slide 1n the'latter. This cona number of peripherally grooved pulleys .struction makes it possible to raise' the mounted free to turn on the upper shaft, pulleys d from the .water for inspection er each pulley having more than one peripheral repalr without yappllcation of tackle as; will groove, at' leastone peripherallv grooved be see'nfrom the following description :-To\

to form an endless band consisting of the sides of the frame :a are ixed'thetrollgh to the upper shaft, a numberof grooved pulgirders g whichexten'd tosuchv a distance leys each i having lone peripheral groove from the'lowex; end,.,of the frame vthat they' yterminatealifiiv'iflow water level. The bearingsof shaft 'al'A and the rollerI o are mounted .zin new .1 f' '"1. betwee eg-gr ers g'and a're held rigidly and'alower shaft mounted inthe frame,z`r togetherf. by- 1'.girdrs' s. On ,the vertical number 'of peripherally groove'd pulleys frame effarejournalled shafts t and t and mounted' the'crank The latter drives shaft -.t each throughgear a and sha-ft t .threugh gear vu.

tinuous rope. A

arcastingsfr adapted to slide scribed comprising a frame, an upperl shaft drives shaft tgroove,

M Shaft t carries two lugs,\ pulley-having more than one groovekeyed shafts to form an endless band consisting ofA in the frame,

mounted'free on the lower shaft and a conp free to turn-on the upper-shaft,. pulley having more than one peripheraly at least one peripherally gro'ovedof pulleys each having more thanA '105 a number of pulleys free to turnlon the grooves o f the pulleys of both shafts so t pulley having more than one groove keyed 4. Screeningu 'apparatus yof the kin'id' de``= to the upper sha-ft, a number ofv'grooved pulleys each having one peripheralvgroove mounted free on the lower shaft, at' least one groovedpulley keyed to the lowershaft an'd a continuous rope. '-f l 5. Screening apparatus ofthe kind described comprising a rame,an upper shaft -anda lower shaft mounted Y1n the `frame, peripherally grooved pulleys'fmounted free,

on the upper shaft', at least one peripherally grooved ulley keyed to thel upper shaft,

".fperiphera'ly vgrooved pulleys mounted free on'the lowerfshaft, a continuous rope woundin the grooves of the pulleys on 'both' shafts `so as to form an endless bandconsisting of arallel lengths oi rope, the said (rope being enger than is necessary to fill all the grooves, guides carried by the frame to cause A. the excess length of ro e, to `depend as la CTI bight and means'for app ying tension to the" said bight.

6. Screening apparatus of the kind described. qcomprising a frame, an ,upper shaft and a lower shaft mounted in the frame, a number of pulleys mounted on theupper shaft,'the end Apulleys being keyed to vthe shaft while the intermediate pulleys `are mounted free thereon', `the said ,end :pulleys havin'g each five peripheral grooves and the said intermediate pulleys having each three. peripheral grooves, a number of 'single groovjed pulleys mounted on the lower. shaft,

the said end pulleys being keyed to the shaft y while the said intermediate vlpulleys are mounted to turn thereon, a contmu'ous rope'Y 'Wound in the grooves of the pulleys on both shaftsso as to form an endless band consisting of parallel lengths of rope, the said rope being longer than is necessary to fill all the grooves, guides carried by the frame to` cause the excess length of rope to depend for/applying tension to as a bight and means the sad-bight. Y t

7. Screening ap aratus of the l ind.de scribed comprisin a frame, an upper shaft and a lowerfshaft mounted in the frame, A

peripherally grooved pulleys mounted free on the upper shaft, at least onevp'ripherally grooved pulley' keyed to the-.upper shaft,

.peripherally grooved pulleys mounted free,

on the lower shaft a continuous ro e wound in the grooves of -the pulleys. on both shafts),

so as to form an endless-'band consis'tgof parallel lengths of rope, the said rope beingdnger than is necessary to fill all the grooves, guides carried by the frame to cause the excess length of rope to depend as a bight and a lowershaft mounted in the frame,

f pcripherally groofved and a weighted pulley suspended in said 8 Screening apparatus'ol the kind desoribed comprising a frame, an upper shaft ulleys mounted free 'on theupper shaft, at east one peripherally grooved pulley keyed' to the upper. shaft,

aforesaid frame,

f 9.y Screening vguide pulleys.;

peri

parallellengths vof rope, the said frepelbeing.

' longer than fis necessary; to fillj allathe grooves', a vertical lframe erected on the herally grooved pulleys' mounted. freev fon t e lower shaft, a continuous ropewound' 'inthe grooves .ofthe pulleys on`r both shafts so as to'form an' endless hand'- eonsistingiof ide ypulleys` carried by '.'f

the-saidgvertical ramejto "causeith'e' excess length'offrop'e to dependy as: a bightad a weighted pulley suspended'in the'bight' f scribed zconipnsing a frame,- an uppershaft apparatus of the kind and a lo'wer shaft mountedin theiframeg'f'peif ripherally grooved pulleys mcmntedv`l freey on` the upper shaft, at least. nehlperipherally 10. Screeningapparatus'of thev kind de-y .y

scribed, comprising a frame,an1 upper shaft and a lower shaft mounted in the frame, perlpherally grooved pulleys, mounted lfree lon the upper shaft, at least"li1e/peripherally grooved ulley keyed it u peripheraly oovedpug'll onl the lower s aft, al continuous .rope wound inthe grooyes of the pulleys on both shafts so; as to' form an endless band consisting of parallel lengths of rope, thesaid rope being' longer than 1s necessary to fill all the grooves, a vertical frame erected on the aforesaid tical frame to cause the excess length of rope to depend as-a bight, a weightedfpulley suspended in the bight and 'means for preventing deposit of matter ,on that' portion of the length of the rope which passes over the of the-kind described comprlsing-a -lowe r grooved,-,dru1n, an upper grooved drum, a continuous rope wound in the grooves of-thetwo drums and? a roller grooved correspondingly witlrl the lower drum and adapted to rotate in. closeproximity with thelower drum tomaintain the rope in the groovesjof-the drum; f"

(12, Screening apparatusv Ycomprising a 11. A`V screen they upperI shaft,` y's mounted free'.

frame, a lower grooveddrum and an upper I vrooved drum mounted to rotate in -the frame, a continuous rope wound on `the two' drums tofform'an endless band consisting of arallel lengths of rope, hearings for the ower drum adapted to slide in the' said frame and means for putting tension on the said rope so that the snidbcarings slide up the frame carrying with them the drum.

105 frame, guide pulleys carried by the said ver- 13.l Screening apparatus leomprisin a a vertical frame carried by the said mein, main frame, ides within it, e subsi lary frame, pulleys mounted on the sid vertical 20 frame adapte to slide in the Seid guides,en frange, a, blght of Irope formed by the said upper "grooved drum mounted to rotate in continuous rope passing over. the said pul- 5 the main frame, a lower grooved drum Y leys, a shaf: mounted 1n the sald vertlcal vmounted to rotate in the subsidiary frame, frame and adapted to be rotated, means onx 4a continuous vrope wound on the two drums the shaft `forl engaging' the .said .bight' and 25 land of length greater than needed to -ll means for rotating the shaft to wind the the drums", andmeans for windin ul? this Said rope thereon. 10 excess'length] for the purpose set fir@ l 15.. Screening apparatus comprisin the 14. Screening pparntufsl comprismg1 1' a features referred to in claim 14ml also main freine, guides withinit, a. subsidiary means for pulling the subsidiary freine 30 frame adapted to slide lin the said guides, an downwards in the 'main frame andy for upper grooved drum mounted to rotate 'in the anchoring it thereto. 4 l5 main frame, a, lower grooved drum mounted- In testlmo'ny whereof I have signed `iny to rotate infthe subsidiary frame', e contnu-` name to this specication ous rope `wound on thetwodrums ando A n v cngth greater than needed to Iill the drums, l FRANCIS WHITYELL BRACKET'L- 

